Dr. Zachary Arntson, D.O.
Contact & Location
763-441-0298
Otsego, MN 55330
Dr. Arntson performs more knee replacement procedures than 30% of orthopedic surgeons in Minnesota, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #100 of 144 ranked knee surgeons in Minnesota.
About Dr. Arntson
Practice. Dr. Zachary Arntson is a board-certified orthopedic surgeon practicing in Otsego, Minnesota. The latest annual CMS data records 18 knee replacements and 14 hip replacements, 32 procedures in all. That is #100 in Minnesota for knee replacement. A Medicare provider since 2010.
Trend. Medicare records run from 2016 to 2024, 4 years. Volume rose from 11 procedures a year to 32, up 191%.
National context. Among 6,612 knee replacement surgeons tracked nationally, 18 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. Otsego has 3 orthopedic surgeons in the current Medicare data. Comparing volume and procedure mix across them is one way to narrow a shortlist.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement |
|---|---|---|
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 11 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 11 | 13 |
| 2023 | 17 | 14 |
| 2024 | 14 | 18 |
Verified Medicare Cases
How is this estimated?
Medicare Part B fee-for-service claims are one payer stream among several, and the share they represent differs by procedure. In 2024 it was 23% to 28% for knee replacement, 25% to 33% for hip replacement. Each verified count above is divided by its own procedure's range, and the results are added, to estimate total practice volume across all payers. The verified Medicare count is the definitive, audited figure; this is a range derived from published national volume projections, not a measurement, and an individual practice can sit well outside it: how these ranges are derived, and their sources.
How Dr. Arntson Compares
Procedure volume compared to the Minnesota state average.
Volume Trend Analysis
Dr. Arntson's Medicare-recorded procedure volume has trended upward over 4 years, increasing 191% from 11 procedures in 2016 to 32 in the most recent data.
Hospital Affiliations & Quality
Quality ratings and complication rates are hospital-level metrics from CMS Hospital Compare and do not reflect individual surgeon performance. Star ratings updated quarterly. Complication data covers a rolling 3-year period.
Patient Resources: Preparing for Knee Replacement
If you are considering knee replacement surgery, these evidence-based guides can help you prepare and recover:
An overview of current surgical approaches including robotic-assisted and minimally invasive techniques, implant options, and expected outcomes.
What to Expect on the Day of SurgeryA step-by-step walkthrough of your surgical day, from pre-op preparation through anesthesia, the procedure itself, and the first hours of recovery.
Home Safety: Creating Your Recovery SanctuaryRoom-by-room modifications, equipment recommendations, and fall-prevention strategies to prepare your home for a safe post-surgical recovery.
Medicare Coverage for Joint ReplacementWhat Medicare Part A and Part B cover for joint replacement surgery, including hospital stays, surgeon fees, anesthesia, and physical therapy.
Knee Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after knee replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full knee replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. Arntson
How does Dr. Arntson's procedure volume compare to other Minnesota surgeons?
Dr. Arntson has performed 32 Medicare-verified joint replacement procedures. The Minnesota average is 43 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Arntson ranks #100 out of 187 orthopedic surgeons in Minnesota.
What types of joint replacement does Dr. Arntson perform?
Dr. Arntson's Medicare data shows procedures in knee replacement (18 cases) and hip replacement (14 cases).
Are there other orthopedic surgeons near Dr. Arntson in Otsego?
Yes. There are 3 orthopedic surgeons in Otsego in the current Medicare dataset. Patients can compare procedure volumes and specializations to choose the surgeon who best fits their needs. Use the state page to view all Minnesota surgeons.
What does the Medicare data for Dr. Arntson represent?
The procedure counts shown are based on 2024 Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). Medicare fee-for-service is only one payer stream, and the share of national volume it represents differs by procedure. In 2024 the share was 23% to 28% for knee replacement, 25% to 33% for hip replacement, which puts Dr. Arntson's total volume across all insurers at roughly 110 to 130 procedures against the 32 verified here. Those shares are derived from published national volume projections rather than quoted from a single publication, and they are estimates with real uncertainty. The OrthoProcedures methodology page shows the full derivation, the sources, and the limits at orthoprocedures.com/data-methodology.html.
Has Dr. Arntson's procedure volume changed over time?
Yes. Dr. Arntson's Medicare-recorded volume has increased from 11 procedures in 2016 to 32 in the most recent data, a 191% increase over 4 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 32 procedures in 2024.
Does Dr. Arntson perform more than one type of joint replacement?
Yes. Dr. Arntson's Medicare data shows procedures in knee replacement (18 cases), hip replacement (14 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Arntson affiliated with?
According to CMS facility affiliation data, Dr. Arntson is affiliated with Mercy Hospital.
How does Dr. Arntson compare to other orthopedic surgeons in Otsego?
Among the 3 orthopedic surgeons in Otsego, Dr. Arntson ranks #1 by total Medicare procedure volume. Dr. Arntson has the highest verified Medicare volume in the city.
What are the quality ratings for hospitals where Dr. Arntson practices?
Mercy Hospital (3 out of 5 CMS stars, hip/knee complication rate similar to national average). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Otsego, Minnesota
Dr. Arntson's 32 Medicare procedures are above the Otsego average of 22. The table below compares verified procedure volumes for orthopedic surgeons practicing in Otsego.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. David Edwards | 17 | Knee |
| Dr. Patrick Okeefe | 16 | Knee |
Patient Resources & Verification
Research reviews, verify credentials, and check official quality data through these trusted sources:
Medicare Care Compare and NPI Registry are official U.S. government sources. Google reviews reflect user-submitted feedback. OrthoProcedures.com does not verify the accuracy of third-party review content.